Officials plan to scale down the search for a missing Atoka fisherman lost on the Mississippi River on Saturday.

Although Stephen Grayer’s boat was recovered Sunday, a search has yet to find his body.

Grayer, 49, left his home at about 7:30 a.m. Saturday to fish in an area he knew well. It’s unknown what exactly sent him into the water. His 16-foot fiberglass boat didn’t show signs of serious damage.

The search has included underwater efforts with sonar, dragging lines and aerial units equipped with thermal-imaging cameras. The river banks and foliage were searched by teams on foot, in the air and with cadaver dogs.